Machine Malfunction - Konica Minolta BIZHUB 25E Field Engineering Manual

4.8 Machine malfunction

No. Symptom What to confirm
1 The LCD shows 1. Is the machine in energy save mode? Yes
nothing.
2. Is the power cable plugged correctly? Yes
3. Is the power switch On?
4. Does the DC output voltages from
Pin 1, 2, 3, 4
Pin 14
Pin 5, 6, 7, 8, 11, 13
5. Is the following connection OK?
• LCD assembly to the Panel PCB. (P3)
• Panel PCB (P1) to the harness to the
main control board. (P5A)
6. If you replace the panel board, the
7. If you replace the main control board,
The LCD shows 1. If you close the flashing cover, the
2
"Please close
the flashing
2. Is the cover secured firmly by
cover."
3. Is the message shown after energy
4. Does the main control board P21-1
5. Press the sensor in the message and
Interlock and JAMC :
6. If you replace ADF board or the
7. If you replace the main control board,
the power supply unit to connector
P3 on the main control boar have the
following output?
+24V
+3.4V
GND
symptom will be fixed.
the symptom will be fixed.
symptom will be fixed.
screws?
save mode is released?
have +24V output?
check the output changes to +3.3V
through GND.
(The interlock and JAMC +24V
through GND.)
ADF cover :
ADF control board P3-8
Main control board P21-2
connecting harness, the message will
disappear.
the symptom will be fixed.
Countermeasure
Press the energy save key, and release
the mode.
No Check No.2.
Check No.3.
No Plug the cable correctly.
Yes Check No.4.
No Power on.
Yes Check No.5.
No Replace the power supply.
Yes Check No.6.
No Reconnect the connection or replace
the harness.
Yes Replace the panel board.
No Check No.7.
Yes Replace the main control board.
No Replace the machine.
Yes Solved.
No Check No.2.
Yes Check No.3.
No Secure the cover properly.
Yes Check No.4.
No Check No.5.
Yes Check No.5.
No Check No.6.
No Replace the sensor or the harness.
Yes Check No.6.
Yes Check No.7.
Yes Replace the circuit board or the
No harness.
Check No.7.
Yes Replace the main control board.
No Replace the machine.
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